15681939

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1$

素因数の和:180

約数の個数: 64

約数和(自身を含む): 28385280

約数和(自身を除く): 12703341

約数列:

[1, 3, 7, 13, 17, 21, 31, 39, 51, 91, 93, 109, 119, 217, 221, 273, 327, 357, 403, 527, 651, 663, 763, 1209, 1417, 1547, 1581, 1853, 2289, 2821, 3379, 3689, 4251, 4641, 5559, 6851, 8463, 9919, 10137, 11067, 12971, 20553, 23653, 24089, 29757, 38913, 43927, 47957, 57443, 70959, 72267, 131781, 143871, 168623, 172329, 307489, 402101, 505869, 746759, 922467, 1206303, 2240277, 5227313, 15681939]

約数ペア:

[(1, 15681939), (3, 5227313), (7, 2240277), (13, 1206303), (17, 922467), (21, 746759), (31, 505869), (39, 402101), (51, 307489), (91, 172329), (93, 168623), (109, 143871), (119, 131781), (217, 72267), (221, 70959), (273, 57443), (327, 47957), (357, 43927), (403, 38913), (527, 29757), (651, 24089), (663, 23653), (763, 20553), (1209, 12971), (1417, 11067), (1547, 10137), (1581, 9919), (1853, 8463), (2289, 6851), (2821, 5559), (3379, 4641), (3689, 4251)]